create or replace type SAMPLE_TYPE is object (person_id number,
                                              birthday date);

create or replace type SAMPLE_TYPE_TAB is table of SAMPLE_TYPE;

create or replace and compile java source named Person as
import java.util.Date;
  public class Person
     { public int person_id;
       public Date birthday;
     }
and

create or replace and compile java source named arraydemo as
import java.io.*;
  import java.sql.*;
  import oracle.sql.*;
  import oracle.jdbc.driver.*;
  import java.text.DateFormat;
  import java.text.ParseException;
  import java.text.SimpleDateFormat;
  import java.util.Date;

  public class ArrayDemo
  {
   	private final String JAVA_DATE_FORMAT = "dd-MMM-yyyy hh:mm:ss a";
  
    public Date getDate(String strDate) {
	    	Date dt = null;
    		DateFormat dateFormat = new SimpleDateFormat(JAVA_DATE_FORMAT);
    		try {
      			dt = dateFormat.parse(strDate);
            } catch (ParseException e) {
    		}
		    return dt;
      }

     public static void passArray() throws SQLException
     {
        Connection conn = new OracleDriver().defaultConnection();

        ArrayDemo a = new ArrayDemo(); 

        Person pn1 = new Person();
        pn1.person_id = 1;
        pn1.birthday  = a.getDate("01-JAN-2000");
        
        Person pn2 = new Person();
        pn2.person_id = 2;
        pn2.birthday  = a.getDate("01-JAN-2001");

        Person pn3 = new Person();
        pn3.person_id = 31;
        pn3.birthday  = a.getDate("01-JAN-2002");
        
      	Person[] P_arr = {pn1, pn2, pn3};

 	 ArrayDescriptor descriptor =
  	    ArrayDescriptor.createDescriptor( "SAMPLE_TYPE_TAB", conn );

  	 ARRAY array_to_pass =
  	    new ARRAY( descriptor, conn, P_arr);

  	 OraclePreparedStatement ps =
  	     (OraclePreparedStatement)conn.prepareStatement
  	     ( "begin give_me_an_array(:x); end;" );

  	 ps.setARRAY( 1, array_to_pass );
  	 ps.execute();
  }
}

ORA-29532: Java call terminated by uncaught Java exception: java.sql.SQLException:Fail to convert to internal representation: Person@e2c7e499
ORA-06512: at "SCOTT.SHOW_JAVA_CALLING_PLSQL",LINE 0
ORA-06512: at line 3

SQL> create or replace and compile java source named Person as
  2    
  3    import java.sql.*;
  4    import java.io.*;
  5  
  6    public class Person implements SQLData 
  7       { 
  8         private String sql_type = "PERSON_T";
  9  
 10         public int person_id;
 11         public String person_name;
 12  
 13         public Person () {} 
 14  
 15         public String getSQLTypeName() throws SQLException { return sql_type; } 
 16  
 17         public void readSQL(SQLInput stream, String typeName) throws SQLException 
 18         { 
 19           sql_type = typeName; 
 20           person_id = stream.readInt(); 
 21           person_name  = stream.readString();
 22         } 
 23  
 24         public void writeSQL(SQLOutput stream) throws SQLException 
 25         { 
 26            stream.writeInt (person_id); 
 27            stream.writeString (person_name); 
 28         }
 29  
 30       }
 31  /

Java created.

SQL> CREATE TYPE person_t AS OBJECT
  2    EXTERNAL NAME 'Person' LANGUAGE JAVA
  3    USING SQLData (
  4      person_id NUMBER(9) EXTERNAL NAME 'person_id',
  5      person_name VARCHAR2(30) EXTERNAL NAME 'person_name'
  6    )
  7  /

Type created.

SQL> CREATE TYPE person_tab IS TABLE OF person_t;
  2  /

Type created.

SQL> create or replace and compile java source named arraydemo as
  2    import java.util.Date;
  3    import java.io.*;
  4    import java.sql.*;
  5    import oracle.sql.*;
  6    import oracle.jdbc.driver.*;
  7    import java.text.DateFormat;
  8    import java.text.ParseException;
  9    import java.text.SimpleDateFormat;
 10  
 11    public class ArrayDemo
 12    {
 13  
 14       public static void passArray() throws SQLException
 15       {
 16          Connection conn = new OracleDriver().defaultConnection();
 17  
 18          ArrayDemo a = new ArrayDemo(); 
 19  
 20          Person pn1 = new Person();
 21          pn1.person_id = 1;
 22          pn1.person_name = "TestName1";
 23          
 24          Person pn2 = new Person();
 25          pn2.person_id = 2;
 26          pn2.person_name = "TestName2";
 27  
 28          Person pn3 = new Person();
 29          pn3.person_id = 31;
 30          pn3.person_name = "TestName3";
 31          
 32         Person[] P_arr = {pn1, pn2, pn3};
 33  
 34     ArrayDescriptor descriptor =
 35         ArrayDescriptor.createDescriptor( "PERSON_TAB", conn );
 36  
 37      ARRAY array_to_pass =
 38         new ARRAY( descriptor, conn, P_arr);
 39  
 40      OraclePreparedStatement ps =
 41          (OraclePreparedStatement)conn.prepareStatement
 42          ( "begin give_me_an_array(:x); end;" );
 43  
 44      ps.setARRAY( 1, array_to_pass );
 45      ps.execute();
 46    }
 47  }
 48  /

Java created.

SQL> create or replace
  2  procedure give_me_an_array( p_array in person_tab )
  3  as
  4  begin
  5      for i in 1 .. p_array.count
  6      loop
  7         dbms_output.put_line('Person Id:'|| p_array(i).person_id||' Name: '||p_array(i).person_name);
  8     end loop;
  9  end;
 10  /

Procedure created.

SQL> create or replace
  2  procedure show_java_calling_plsql
  3  as language java
  4  name 'ArrayDemo.passArray()';
  5  /

Procedure created.
SQL> 
SQL> set serveroutput on
SQL> exec show_java_calling_plsql
Person Id:1 Name: TestName1
Person Id:2 Name: TestName2
Person Id:31 Name: TestName3

PL/SQL procedure successfully completed.